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Finding the Fourth Proportional to 984.23, 1,476.60 and 436.28

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Solution

The fourth proportional to 984.23, 1,476.60 and 436.28 is: 654.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.23 : 1,476.60 = 436.28 : x
  2. Step 2: Convert to fraction form
    984.23/1,476.60 = 436.28/x
  3. Step 3: Cross multiply
    984.23x = 1,476.60 × 436.28
  4. Step 4: Simplify right side
    984.23x = 644,211.05
  5. Step 5: Solve for x
    x = 644,211.05/984.23
  6. Step 6: Final answer
    x = 654.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.